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Finding the Fourth Proportional to 15,836.88, 21,854.28 and 8,763.12

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Solution

The fourth proportional to 15,836.88, 21,854.28 and 8,763.12 is: 12,092.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,836.88 : 21,854.28 = 8,763.12 : x
  2. Step 2: Convert to fraction form
    15,836.88/21,854.28 = 8,763.12/x
  3. Step 3: Cross multiply
    15,836.88x = 21,854.28 × 8,763.12
  4. Step 4: Simplify right side
    15,836.88x = 191,511,678.15
  5. Step 5: Solve for x
    x = 191,511,678.15/15,836.88
  6. Step 6: Final answer
    x = 12,092.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.